diff --git a/include/asm-powerpc/ipcbuf.h b/include/asm-powerpc/ipcbuf.h
index 71382c1ec6e3..2c3e1d94db1d 100644
--- a/include/asm-powerpc/ipcbuf.h
+++ b/include/asm-powerpc/ipcbuf.h
@@ -27,7 +27,8 @@ struct ipc64_perm
 	__kernel_mode_t	mode;
 	unsigned int	seq;
 	unsigned int	__pad1;
-	__u32		__unused[4];
+	unsigned long long __unused1;
+	unsigned long long __unused2;
 };
 
 #endif /* _ASM_POWERPC_IPCBUF_H */